阳离子交换膜在土壤钾释放及小麦对钾素的反应研究中的应用

A pot experiment was conducted in the growth chamber on Saskatchewan soils with different texture to determine the K release status and wheat K demand.The relationship between K uptake and soil available K extracted by cation exchange membrane(CEM-K) and the effcet of K fertilizer on wheat growth and soil available K was also evaluated.Treatments of 0,60 and 120mg K/kg were applied to sandy,low and high K loamy and clay soils,The highest yields were acieved with the application of 120mg K/kg in sandy soil and 60 mg K/kg in other soils.On the whole,the clay soil contributed K more than other soils from slowly available fraction.Regression revealed a linear relationship between the soil available K extracted by NH4OAc(Ka) and CEM-K in suspensions(r=0.93).Results also showed that CEM-K in burial and in suspensions were different not only in the amount but also in correlation with Ka or K uptake.

Use of cation exchange membrane in soil potassium release and wheat response to potassium

A pot experiment was conducted in the growth chamber on Saskatchewan soils with different texture to determine the K release status and wheat K demand.The relationship between K uptake and soil available K extracted by cation exchange membrane(CEM-K) and the effcet of K fertilizer on wheat growth and soil available K was also evaluated.Treatments of 0,60 and 120mg K/kg were applied to sandy,low and high K loamy and clay soils,The highest yields were acieved with the application of 120mg K/kg in sandy soil and 60 mg K/kg in other soils.On the whole,the clay soil contributed K more than other soils from slowly available fraction.Regression revealed a linear relationship between the soil available K extracted by NH4OAc(Ka) and CEM-K in suspensions(r=0.93).Results also showed that CEM-K in burial and in suspensions were different not only in the amount but also in correlation with Ka or K uptake.